[jQuery] Ajax call Scope - Module Pattern and non singleton pattern

[quiKe]

Hi, my problem is due to the scope. Using the module pattern following
the Eric´s design explained on the Amazon Books widget example(http://
net.tutsplus.com/tutorials/javascript-ajax/create-an-amazoncom-books-
widget-with-jquery-and-xml/) we have something similar to this:

var BOOKS = function(){
        var _P = {
                init : function( params ) {},
                params : null,
                data : null,
                loadXml : function() {
                        $.ajax({
                                type : "GET",
                                url : _P.params.xmlPath,
                                dataType : "xml",
                                success : function( data ) {
                                        _P.data = data;
                                        _P.max = _P.params.perView;
                                        _P.count = $( "book", data ).length;
                                        _P.preloadBooks();
                                        _P.browseBooks();
                                }
                        });
                },
                first : 0,
                max : 0,
                count : 0,
                preloadBooks : function() {},
                browseBooks : function( browse ) {},
                tooltip : {
                        show : function( e, $o ) {},
                        hide : function( e, $o ) {},
                        getMouseCoord : function( v, e ) {},
                        getViewport : function() {}
                }
        };
        return {
                init : function( params ) {
                        _P.init( params );
                }
        };
}();

 And it works, perfectly, after we can access to any _P attribute with
the use of _P.xxxx in any part of the code, and the call works
perfectly saving the value of the ajax call. The problem is that this
pattern creates a singleton instance, so it is not possible to use
more than one widget on a same web.

Which patter could we use to give it multiple instances and be able to
use several widget?
I tried several ways but i can never save the async call into
variables, always undefined result.

Thanks indeed.